45980 303 St. over Vermillion Rv
Clay County, South Dakota · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 45980 303 St. over Vermillion Rv in Clay County, South Dakota, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 3 (serious condition) on the 0-9 scale.
- It was built in 1909 and reconstructed in 1970, making it 116 years old at the 2025 inventory.
- It carries about 15 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 14 of the 93 inventoried bridges in Clay County rated poor (15.1%); 14 (15.1%) are rated poor.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (42.99659, -97.00431)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 4 | Poor condition |
| Substructure | 3 | Serious condition |
Bridge details
| Structure | Steel through truss |
| Length | about 135 ft |
| Location | 6S & 7.8E Irene |
| NBI structure number | 000000014078060 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Clay County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SD050 over Sd 50 Wl So Dak Owned R | 1981 | 5,147 | Good |
| SD050 over Vermillion Rv | 1981 | 5,147 | Fair |
| SD046 over Blind Ck | 2020 | 3,303 | Good |
| SD050 E over SD050 L | 1977 | 3,094 | Fair |
| SD019 over Vermillion Rv | 1997 | 2,764 | Good |
| SD019 over BNSF RR | 1997 | 2,764 | Good |
All bridges nearby: Clay County, SD bridge conditions · every bridge in Clay County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.